code: def get_filenames(subdir):
      """Get the data filenames manually."""
      import glob
  
      base_dir = os.environ.get("SATPY_DEMO_DATA_DIR", ".")
      return glob.glob(os.path.join(base_dir, subdir, "*"))
  
file_path: satpy/benchmarks/utils.py
imports: import os
label_desc: Use image node_id 1 for calling a global function with example usage: get_filenames(subdir) and returns: glob